Canon WUX500ST Quick Start Manual page 52

Select an Aspect Ratio (Screen Aspect) Matching the Screen
16:9 D. image shift
Select this when you use a screen with an aspect ratio of 16:9. Keystone correction
cannot be performed in this mode. However, it is possible to move the image up /
down when projecting level.
4:3 D. image shift
Select this when you use a screen with an aspect ratio of 4:3. Keystone correction
cannot be performed in this mode. However, it is possible to move the image left /
right when projecting level.
5
Press the OK button to accept your setting and then press the MENU
button.
52